51186620 has 24 divisors (see below), whose sum is σ = 107631888. Its totient is φ = 20448000.

The previous prime is 51186617. The next prime is 51186623. The reversal of 51186620 is 2668115.

It is a happy number.

51186620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51186617) and next prime (51186623).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51186623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22955 + ... + 25085.

It is an arithmetic number, because the mean of its divisors is an integer number (4484662).

Almost surely, 2^51186620 is an apocalyptic number.

It is an amenable number.

51186620 is an abundant number, since it is smaller than the sum of its proper divisors (56445268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51186620 is a wasteful number, since it uses less digits than its factorization.

51186620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 51186620 is about 7154.4825109857. The cubic root of 51186620 is about 371.2947577988.

The spelling of 51186620 in words is "fifty-one million, one hundred eighty-six thousand, six hundred twenty".